DEVELOPMENT OF HAIR elongated and converging slightly above amI Inflow. Dr. Maurer has called attention to the remarkable likeness between the embryonic hair when at this stage and the simple tttnise.-or^ans of lower Vertebrates. Later there is formed below this a denser aggregation of the eorium, vrhieh ultimately beeomc.s the papilla of the hair. This IK the- apparent homolojjjuc, of tliu* first formed part of a feather, \vhieh projects as a papilla before the epid*>rralH hu« under- gone any modiltication. Il«*ut'*! thert» is from the, very tirst a din*»r- etu*e between fratlierH and h;urs-—-'UdiHeivixtt*. whh*h mu^t be o.'uv- borno in mind, illy wlien we consider tho Mr«»nj^ K u pe. r ii tt I ul rime m- blan«*e l»etween h;ur« and tho ftiisiplo bnrb- <. Still full Fr<*, 2.-— Four «Htt$pra'ms of utaircs* in ttu'r <tavwloj»m«*«t mnrnnui!* * At t t # ; 1<* C% 1>, later till* Kttm* f>t A* K«ttli^«t »tage in one of in whUth th« dtiniial itftpiila ftppenrn tbrv««taffM in the jl«wlopmi«t «f tho hair in th« ii tun tin wtsoryo. «<7, ilnir-i>ulb ; rr«, hortxy layn't of the epIdwiniH ; fttlt hair * follicle 5 j/rrw, hulr- dl*|»rt*HB€*<l into U tltl»U- ; A, h»frf in or* tint «ur- !„„ Kft*t«'t tin* -1 KM Ut Mire, ift IB „ Kt*t«' tn* face; m«<j» Malpighiaik layer of i'i»i<!«rutlN ; i*pt -1, KM Ut Mire, 'VMJ dermal papilla; «?6» d«v«l<ij>l»g *Mj1*acemt» glamin ; lined with <**»lirt " fri,iu tho alptghti, but is filled with a continuation of the more* «up«%rticial t**4lH of the epidermis, This is the hair-follicio, arid from the <*p«l«trini« eells arises the hair by direct incstaii«irj>hoH!« of thong eells ; there m no excretion of the hair by tin© cells, hut the celts fajcome tlw* hair. From the lu&ir-folliele also grows out a |»*iir of glands, which eerve to keep the fuHy~form&d hair moidt. J)r. Meijerle1 has liitely descsribed in uoino detail tho xxl.